Step-by-step electrical transmitting and receiving apparatus.



A. BARR; w. STROUD @L 1. w. FRENCH. STEP BY STEP ELECTRICAL TRANSMITIING AND RECEIVING APPARATUSg I APPLICATION EILED ROV- 30,19I4.

' Patente-d July 20, 1915.

. 1 www@ JM@ ma plicants, (or ,i

im if airfare ein iii einem Si initile;

el ineen, @Locom STBFS, Jl JAMES FRENCH, CIF

T0 @A :To ANI) STROUD, LXMITED, 0F ANNIES- ienrnrer ANNIESLND,

emesse.

To QZZ whom it may concern.'

Be it known that we, ARCHIBALD BA1-mf WILLIMJ STnoUD, and JAMES @Vene FRENCH, subjects of the King of Great Britain and l'reicnd, and eil of Canton street, Armiesu iond, Glasgow, Scotland, have invented new and useful improvements in Step-bTSte-p Elect-rioni Trensmitting and Receiving Apparatus, of which the foilowing is a speciu ication. A

This invention relates to improvements in apparatus for the communication of indica'- tions eiectrically, on the stepeby-step system, from a transmitting station to a receiving station, andhas for its specia object the provision of a transmitter that operates a receiver forward sind backward, While the transmitter is moved continuously in one direction,` the reversal of motion of the receiver taking place any desired position or at each of a number of positions of the transmitter, for example, at a' position c rrespondingv to a neutral or to a manirniim or minimi-ann indication or :stencil of two such positions;- lfn the o oeretion of appa? ratus according to this invention. as will hereafter be understood, reversal in the direction of :notion of the transmitter will in.

all cases be simultaneously accompanied by a reversal in the direction of motion .of the receiver, so that n. reversal 'oit' the receiver trikes place `whenever there is a reversal of the trunszniter as Well et'tlic desired p0- sition or 'iositions when. transmitter undergoes no reversal.

The improved system is especiaiiy eppiicable for such purposes es the indication ot bearings "l rising', say, from 4 0 starboard to l'fg-C', then to 180O and passing continiiouely to 179g@ port end on to port i, OD port, 2,10 starboard, etc., or for the indication of helm positions, passing from Starboard lo thi-cogli @o to port 1O and so on, by a reversal of the direction of rotation of the receiver at the appropriate times Without a reversal of the direction or" motion of the transmitter. f

The transmitter andreceiver may be of the general lines of those described in United States Patent No,v 1002013, dated 14th No; vember, i911, granted to Archibald Barr and William "''troud, two off the present aptygiee opereting in s more Specicetofiifietters Patent. oepneane mea november s0, 191e.

' nommen Jury 2o, i915, sei-fai in. cresce,

or iess analogous'manner.) In the cese of a receiver operated by the successive energization of three eiectromagnets, which. we 'may refer to as l, 2 and 3, energized in the order l, 2, 3, for one direction of motion and in the order 3, 2, l, for the-other direction, thereversel of the direction of motion of G0 'the receiver may be accomplished by an in,h torchenge of two' of the circuits between 'the transmitter and the receiver. Suitable l', means for this purpose may be constructed v by the addition to a transmitter, such as that o5 described in 'United States Patent N o. 1009013 of i911, Figures 9,i0,11 and 12, of

no reversing switch operated at the appropriate time, which interchanges the circuits to two of' the electro-magnets. Thus sup- 70 pose we require to operate a bearings receiver continuously to indicate bearings rising from 0 to 180 by LQ steps, and passing continuonsiy downward again infreedings to 0 and again rising for one direction of motion of the transmitter. In this case suppose that in rising from 00 to 1800 the order of action of the n'iagnets is l, 2, 3, l, 2, etc., and ='that when the reading is 180 the magnet 3 is en ergized. If non7 thA reversing switch is 80 operated 'so as to interchange. the connections of the circuits to magnetsl and 2, when the reading is 180 the next magnet to be energized will be 2 order of action will vnow be 3, 2, i, 3, 2, etc., 55 so that the receiver will more backward for the same direction of motion of the transmit,- ter, When passing through OO 4the interchange is again made, so that the readings are again caused to'increcse. We energize the magnets in the orderl, l end 2, 2, 2 and 3, 3, 3 and 1, and `so on.' n this case 'the reverselv c an be performed in like manner if it is effected Whenonly one magnet (say No. 3) is energized. in this 95 cose when the reading is 179%", say, the magnet 2 is energized, when 2 end 3 Aare energized the reading Will be 17,9%", thenflSO"4 when 3 is energized, and if 1 and 2 are nowV interccanged the next step forward transmitter energizes 3 and 2, which brings' i the receiver back to 1792-0 and so on. 'switch used for eii'ecting the reversal v be operated through a carrying mechanism f actuated by the transmitter, ,so that the-'10o switch semaine et rest until the epprcpiiete .Y

instead ort l, and the l ln some cases of no 10o( The i magnet is euergizea board n., und the next Siep of the transmitter port musee #the iniiioaiion to change to ireftifeio, eee. means ienotiug the change of rire group iiifiioatioii oud of the switch ior reversing the oireoioi of motion of the receiver may again bo eieete, when ehe Y@o through. 1H, iii oouiiectioii with the counter merimiiisui provide@ indicate the number of sirops by the receiver, stops are provifieai for the maximum and minimum indications.) it will be dem: that if e receiver is origiimiiy ourI of Siep with the igi'zmsmiiter after passing through the maximum miniiiiuui posisions, the transmitter and re oeiver Wiii be in accord, because 'if the reoeiver is reading higher (or iower) than the transmitter it Wii be stopped ai, the maximum (or miriimuiri) iriciioaiou uutii the zrrausmiier is at its maximum (or miniindicetiori. Transmitters and receiv @sappi-oprime for the indication o' heim positions emi other 'purposes muy marie ori e similar pion. llo. imho armored drawing, Fio. l shows diagremuiaticaiy the general arrangement o one .form carrying out loe present in- 2 shows im greoer detoii how jhe ro'nsmitiiiig portion may be :irruigeii, Fig shows o, doveioped deizaii of part of Fig L in Fig. i iiie transmitter is shown ou iie ioit mid a. receiver-ori the, right. 4. is the working hoodie 'which through he spur wheel 5 drives fahe two spur wheels 6 and L Upoii @bhe shaft of is aoommutator 8, o1 the type fiesoriiied in. imho speciiozizion of Uniod States Potent No. GOSOB. of 191i. This commuuior Comisi-s of o suitable conducting portion 9 mounted upon an iusuuting drum 10. The iefi mimi portion. of the conductor 'forms 2i continuous ring, upon which the brush il connected with one of the mein leads (Saly the #H presses. s shown in Fig. l, zue brush 1 is connected to Ehe ieed, bui; ii' the commuttor is rotated in the ciireoiiou of the arrow ibo successive conmots mooie Wiii be to the brushes l, 2, 3, in @he order l, 1+2, 2, 2+3, 3, 3+1., etc. Furtiier explanation of t is part of the meehemsm. is unnecessary as the arrangement. has

The operation of the' mei/,ezio

wiieei .i9 of ifzie carryover meciinieui if; geared to the rerersmg swi'oii di."

through the spur wheels 'i sind 22. the ium '20V aro two sete of oouizsiee *23.* Mund Q5, E26 (the iaaor comme beingsiiowu deveiopod im ing from. iie posibiori siiomi im current Elow through brush i.. thence to brush fifi ou die reversing through iie f-,ouecL-pieoe io #he 3i :md from shore to iii@ eiemem; o; receiver. 'if the eorimwzior i@ is roaaeo. tiii brush maires cominci; Eve-ii es brush 'L then ourreu; wiii eiso iiow through brush 'i-EZ, through tiro coutzic piece io faire 3Q] am@ receiver oiem'eii; 5%; i-rue boo. E? 52 Wiii iso mugueized. ter sii iuriiier romtioii i0 tomaat at i wiii ior'ofc-eioi thai. ai; 2 Wiii onijv be marie tiiei the reeoiver eiemerifs 52 xviii :rione oe Retired,

'it Wlii further be seen :from i, e coimocioris that Whenever bruh i is oii ueoteoi o brush i'i eiemerit 53 Wiii oi'wiiys N meg'neizeii. We simil rio-W consider happens when We reach rile me i minimumiiidieaiion Wiiiie we smi drum l@ im che same sense as iieiore. i'i; 1 maximlmi or minimum posiiior, *rhs iimii wheei i?) of die carryover meoiiuiiiii moved ihrough :i whole. SiepT my one i of :i revolution. The spur-gearing 2i Y Such *mimi tiiiS :Siep correspoiis to :i revoiution o? the drum 205 fairer which brushes 4i mici 32 are brought into or with the piece 26 sind the marshes ojif wih 25. Thus in this :posiiou il euri are oourieeiie ami 42 anni 3i. rem; 'from l now iiows via @ci through piece 26 o 392 sind thence zo "ik 'Wiiiie currerni;v from Q fiows via i2 iiirougii piece to BL mici 'tiienoe to 5i, thus Changing die connectionsV of two of iii@ eieo tro-miguois of rile receiver and there'iw e versing @The iireotion of rotation, TuS-aie tire cis-um i() is continuousijv rotiite iii orio :mii the sumo irection, the receiver rf/iii move forward until the carryover errang@ ment bezween 18 and. 19 causes rire firum 525i' to be turned iiroug'n haii n revou'ioo after which it wiii Work bmfkwar uutii '2P-e i513 again turned through haii u reroiubio when it wii work orwiiroi orio/e v @hat magnet being noi',

bhe sommation of which is inte?- While the ciirecitio'n rive :it he tiansmit'ei i'maiiis unchfmged for the :apparatus Working on the st-spby-sep prin- Consisting of a ifeceiver provided with 'number @i @lectin-magnets having sirgiiii e? iii@ mm inaction Q. iiectrical mms it-ing ami receiving @mms Working: on he-st-bystep pridcvipif, consisting of a receiver proviiie Wiiii if, number of eiectro-magnezs having circuit @mmions a-ciapte to b@ ccmgieteri by a gautier, the iransmitmr :having mamas:

im direc-- cion of the magiits iQ op'a'ce receta/'ei' and, baciwaici iiecsion, in cmubinabion 'with aircui; means which a, specii position of the imiiismit'te' peiaa iniiecimiige connections a. time when only one Qi: the magnets is eifiexgim Wilii@ iii@ dimcii f iiiva @it the ti'aismit'ei: iemains unc'haiigei iogatiiei" Wifh messina 'foi' fienoi'ug om. siii@ o time specifi@ 'position the imismitiei' is; spare/ming, im?

the purposes Sei'. forth. l

iik "icziricai txaiismi ting; mid feaeivim; apparatus Working an the sep-oyep a number of siectmmagnts having ennui?.

12, 'Electricai 'iransiiitting imfi, ai/apaiitus wmiiif im iii 'sepby-siep prinzipie, isoiisising i ies'ewe proviciefi mii three aiectm-mgna's 'ifm-ving @inuit w'ne tionsj a iimsmitif having: means capabie Ming riveli fofwaici ami backwafi201: cfm" iniinp; -he ciii'xis ami the successive easy @ization of the, magneis @parat-63 the, se ceivw" in a. forwfu ami. 'backward fircvii, in combination Wish ci'fcuii, means which ai; .i specific "posiio'fi of -'ie tiziismittei Qpe'ate in interchange tw@ of time circuit @im actions it :L time when. one of the magnet-s is emi*- gized, Whiieihedii'sction of drive ai. 'the m'ansmitter' remains' unchanged, togeiiaei with im auxiiiay destro-magnet 'having' circuit 'which is; com'pieted oi' inl-0km i'iy ish@ operaon of the ircui: means.

13. Eiestrimi rmzismiing ami sfecfviiig being driven forward and backward for controlling` the circuits and the successiveenergilzation of the magnets to operate the receiver in a forward and backward direction, in comblnation with a switch for interchangmg two of the circuits and gearing actuated by the transmitter to operate the switch at a specific position of the transmitter, for the purposes set forth. Y

14. Electrical transmitting and receiving4 apparatus working on the step-by-step principle, consisting of a receiver provided with three electro-magnets having circuit conneca-receiver provided with tions, a transmitter having means capable of being driven forward and backward for controlling the circuits for the successive energization fof the magnets on the l, 2, 3, principle to operate the receiver in a forward and on the 3, 2, l, principle in a backward direction, in combination with means for interchanging two of the circuit connections at a time when one of the magnets only is energized while the direction of drive at the transmitter remains unchanged.

' ARCHIBALD BARR.

WILLIAM STROUD. JAMES WEIR FRENCH. Witnesses:- ,I

AJzLINE DAvms, FRANCIS MoRRIsoN.

vat 

